Starting valve-gear for internal-combustion motors.



J. ROMEYN.

STARTING VALVE GEAR FOR INTERNAL COMBUSTION MOTORS.

APPLIGATION FILED JUNE 17, 1912.

1,073,633. Patented sept. 23, 1913.

W IMM M M AttornZy.

JEAN ROMEYN, OF BRUSSELS, BELGIUM.

STARTING VALVE-GEAR FOR INTERNALCOMBUSTION MOTORS.

Specification of Letters Patent.

llaten'ted Sept. 23, 1913.

Application filed lune 1'7, 1912. rSerial No. 701,215).

To all whom, t may non .com f Be it known Athat ll, Jilin "Reitern, GGAvenue Jean Volders, lirumls. Belgium, have invented certain 'new anduset'ul 1mprovements in Starting" Valve-Gear :tor Internal-Combustionli/lotors; and 1 do hereby declare the following 'to be a full, clear,and exact description of the invention, such as will enable othersskilled in the artto which it appertains to make and use the same,reference being had to the accompanying' drawings, and to letters orfigures of reterence marked therein, which form a part oi." thisspecification.

Certain internal combustion motors have hitherto been fitted with valvegear for the purpose ol: starting them by means oi eompressed air beforethey begin to Werk on fuel and to eli'ect this, it has been necessaryfirst to operate the starting valve, keeping the VFuel valve closed,then, as soon as the motor is started, to throw the starting valve outoi' action and the t'uel 'valve into action.

The present invention relates to an arrangement by means of which theseconditions can be realized and theresnlt is obtained essentially bytransmitting the action of the cam operating the valves to the saidvalves through a member that is variable in its height.

The appended drawings show by Way of illustration or example tivo formsor embodiments of the invention.

Figure 1 is a vertical section taken on 'the line E, F Fig. 3. Fig. 2 isa vertical section of a modified form of 'the invention. Fig. 3 is across section taken on the line A, B Fig. 1. Fig. et is a cross sectiontaken on the line C, D Fig. 2.

The modification show n in Fig. 2 differs only from the arrangementshown in Fig. 1 4 in the method oi' controlling the fork 5 hereinafterdescribed. In both casos the cam shaft l carries as usual one cam forthe starting valve and one cam ifor the tuoi valve for each cylinder'.lin reversible mo tors each cam will be replaced by a pair of cams injuxtaposition, one for running ahead and the other for running astern.Movement is transmitted 'from the cam` to the valve rods 13 by means otintermediate members embodied in the gear for Working each. valve.

To put the valves into or out et action it is necessary to form theaforesaid. intern mediate members in such a .manner that it is possibleto vary their height H, between the cams i?, and the rollers 14 of thevalve rods Each 'of the intermediate members is constituted asfollows:--i\ fork 5 oscillating around the working shaft 3, is formed orprovided with an inclined surface 7 On `which the Wedge 12 slides. Thisfork 5 carries a roller G which is operated by the cam 2. When theworking shaft is caused to turn, the cam 1i keyed thereto pushes theroller 9, the ends of Whose spindle form guide blocks working in theguides 18 toi-med in the forks 5 and the said roller transmits itsmotion to the Wedge 12 by a connecting rod 11. Then the wedge 12 ispushed toward the left, the cam 2 actuatcs the valve rod 13, but as soonas it returns to the bottom o1" 'the inclined plane, in consequence ofthe rotation of the cam 4, all connection between the cam 2 and thevalve ceases. In the embodiment of the in vcntion shown in Figs. 1 and3, the fork is then raised by the spring 8 and the cam 2 turns freelyunder the roller 6.

ln the embodiment shown in Figs. 2 and 1-, the spring 8 is replaced by alever 15 pivoted to the shaft 1e. When the wedge 12 has returned to thebottom of the inclined plane T, 'the said lever 15, actuated by the cam17 raises the fork 5 sufficiently to prevent tbe roller (i from engagingwith the cam 2 as it rotates. When the motor is stopped, the workingshaft is in such a position that all the forks are raised.

In both of the embodiments just described the Working shaft may bemanually coutrolled by means of a. lev'er which is c0nnected therewithand actuated by a toothed sect-or: according to the different positionsgiven to thisle/er, the positions of the cam 4 and the fork' 5 areregulated, and consequently the valve rod 13.

` It should be observedthat in multi-cylinder motors the distributionshaft l and the working shaft 3 run the whole length of the motor. Onreversible motors the shaft 3 can make, in addition to its movement ofrotation, a longitudinal sliding movement which renders it possible whenthe motor is stopped, that is, when all the forks are raised, to bringthe rollers 6 either to engage the gofiliead cams, or the go-asterncams. Thus, by causing the Working shaft to turn, the motor can bestarted in either direction as desired.

By giving the cams 4 a suitable prolile and a proper position anddirection it Will be possible to start by air, say a four-oylin dermotor, With the cranks in any position Whatever and thereafter to passgradually to running on fuel in such a Way that there Will always beavailable a turning couple sufficient to prevent the stoppage of thenotor, even Where the ily-Wheel is ./ery light.

l. In starting valve gear for internal combustion motors, thecombination of a fork oscillating on a Working shaft,'an inclined planecarried by said fork, a Wedge sliding on said plane, a cam keyed on theWorking shaft and effecting the movement of said Wedge.

2. ln a starting valve gear for internal combustion motors, thecombination of a fork oscillating on a Working shaft, an inclined planecarried by said fork, a Wedge which slides on said plane, a cam keyed onshaft and e'ecting the movev JEAN ROMEYN.

Witnesses:

FAUL CART, ROBERT Cronin.

